NullPointerException is thrown when ResultSet.first() is invoked on "streaming" result set

Trying to invoke method first() on streaming result set results in NullPointerException. It should be SQLException telling that according to JDBC spec FORWARD_ONLY cursor does not match well with first()

stmt.setFetchSize(Integer.MIN_VALUE);

rs = stmt.executeQuery("SELECT dt FROM timeStamps");

rs.first();

ts = rs.getTimestamp(1);